OK. Apparently when the Ultra PS died, it may have taken the motherboard with it. The machine has been blue-screening ever since the PS replacement, just not as frequently as before.
I also noticed that the HSF on the Northbridge isn't working. When searching Google for issues with the Northbridge, I found that this is happening to others and that it actually signifies a motherboard failure. The Northbridge gets HOT and I'm assuming that over time, the heat has killed the motherboard.
This is the time to upgrade, I guess. I'll more than likely buy a new motherboard/CPU combo and it'll more than likely be a quad-core CPU that I'll be getting (Phenom):
EDIT - I ended up purchasing a
Foxconn A79A-S AM2+/AM2 AMD 790FX ATX AMD Motherboard
Retail AMD Phenom II X4 940 Deneb 3.0GHz 4 x 512KB L2 Cache CPU
and basically rebuilt this system...it is SMOKING. I was gaming and installing game patches for another game AND XP updates, and only two cores were being used while two were idle!! I put 3GB of RAM into the system (I almost put 4GB but then realized that XP 32-bit would only see 3GB of it...time for a 64-bit Windows OS install, I think). I really should install some high-grade RAM, though, as I think I only have 667mhz installed.
I also bought a
BIOSTAR TForce TP43D2A7 LGA 775 Intel P43 ATX Intel Motherboard
for to replace the motherboard in the Pentium-D system...I'll use this motherboard and CPU to rebuild my old Sempron 3000+ system (I'm starting to stack up 'older' motherboards and CPUs).